Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id C936BC433FE for ; Wed, 15 Dec 2021 12:54:39 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S242630AbhLOMyi (ORCPT ); Wed, 15 Dec 2021 07:54:38 -0500 Received: from ams.source.kernel.org ([145.40.68.75]:43968 "EHLO ams.source.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232543AbhLOMyh (ORCPT ); Wed, 15 Dec 2021 07:54:37 -0500 Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ams.source.kernel.org (Postfix) with ESMTPS id B03DEB817E2; Wed, 15 Dec 2021 12:54:36 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id ED1CCC34605; Wed, 15 Dec 2021 12:54:34 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1639572875; bh=sDAdKAEWoKymaU21bL9bOk0WN3gSE+kY6EqkVtUA720=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=ShgL11Oa0oixb+6a4yve3OYKiVghK7lFd7Gz/4APwtylGpB7fFj6ByFlk4fe5z7Ac j0JB5fHBA9pQP7VewcqE1SvJ8fySidL5kgrLiDSbkubnxkzzRzaZYrQXYEDe1JFp+c x4h/VTEwMcPEG/oopKYDHN2uiFYGjtss4ow8KvAw= Date: Wed, 15 Dec 2021 13:54:33 +0100 From: Greg KH To: Linus Torvalds Cc: Carel Si , Jann Horn , Miklos Szeredi , LKML , lkp@lists.01.org, kernel test robot , fengwei.yin@intel.com, stable Subject: Re: [LKP] Re: [fget] 054aa8d439: will-it-scale.per_thread_ops -5.7% regression Message-ID: References: <20211210053743.GA36420@xsang-OptiPlex-9020> <20211213083154.GA20853@linux.intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Mon, Dec 13, 2021 at 11:44:31AM -0800, Linus Torvalds wrote: > On Mon, Dec 13, 2021 at 10:37 AM Linus Torvalds > wrote: > > > > So I'll just apply the patch. Thanks for the report and the testing > > Done, it's commit e386dfc56f83 ("fget: clarify and improve > __fget_files() implementation") in my tree now. > > I didn't mark it as "Fixes:" or for stable, because I can't imagine > that it matters in real life. > > But then it struck me that Greg has mentioned that he ends up getting > a lot of performance regression reports for people testing stable and > they can be distracting. > > So I'm adding a stable cc here just so people are aware of this as a > "yeah, will-it-scale.poll2 performance regression has been reported, > has a fix available if somebody cares". Thanks, I'll keep an eye on this. greg k-h